You might need to consider not doing this. I know everyone wants to make their own cool items, but I've seen A LOT of people against this. Those people don't really understand how it works though, and they're telling everyone that these will brick their game. Some have even wrote letters to Nintendo. Of course Nintendo's response was as good as "We dunno" because it was something like this:
"We haven't tested these items but as far as we know they're dangerous, so don't use them."

Everyone seems to be complaining about it. First because of all that, and also because now everyone's wanting/selling/buying lightsabres and not any other items. It's flooding the boards of most forums out there.